Hmmm, i dont think its fair AMOG a guy who is hitting on a girl you know assuming you have no interest in her.
However, i sometimes AMOG a guy who is hitting on one of my friends simply because i dont want my friends getting with a douch bag and ruining my social circle

. Its not so much i will go out to destroy him, but more test him myself. I dont intend to make him fail or lose out on the girl (unless he screws up big time, which he usually does by himself). But the main reason i do it is so he is ver clear that i am the guy who is incharge here and although i have no problem with him joining in our group, he better realise that he is lower in the pecking order than me.
I would only do that to a guy who was htting on a girl directly in my social circle, not just some1 i know.
I wouldnt "crush" the guy, just be friendly, assertive mainly to let him know that he is the beta. But as soon as he reacts to this (by giving signals that he is looking up to me) i will normally ease off and help him with the girl.
9 times outta 10 the guy does fine, we get on and he gets his girl. Its just a little test to stop idiots interfering with my group.
/madals